Iowa Code § 29A.42: Trespass or interference with official acts.

1. Any person who shall trespass upon any military reservation, camp, or armory, in violation of the orders of the commander thereof, or officer charged with the responsibility therefor shall be guilty of trespass and shall be punished as provided in section 716.8.

2. Any person who shall molest, or interfere with any member of the national guard, in the discharge of the member’s duty shall be guilty of interference with official acts under section 719.1, subsection 1. The commanding officer of such force may order the arrest of such person and cause the person to be delivered to a peace officer or magistrate.